Originally Posted by
AndyLate
Collapsible stocks are not just for mall ninjas. I just got home from the range where it was beneficial to shorten the length of pull on a scoped AR to allow my small statured friend to shoot it comfortably and to make up for the warm clothes I was wearing when I shot it. The adjustable stock also allows my 6'5" brother to shoot my AR without looking like he's shooting a toy gun.
My body armor days are behind me, but I know adjustable LOP stocks are a boon to the LE and Mil folks who wear it.
I use a 16" and a 20" rifle upper on a lower running the A-5 system with a standard rifle spring and A5H2 (standard) buffer. Both uppers are perfectly reliable with ammunition from mild handloads to Mil spec M193 and green tip. The A5 system works, period.
Your 20" HBAR will run reliably on a carbine RE with H2, H3 or H6 buffer, an A5 RE with an A5H2 buffer, or with a standard rifle RE and buffer.
The most obvious functional difference is that a rifle RE limits you to a fixed LOP.
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